Intertechnik P62/3.90/140 | 3,9 mH | 0,28 Ω | 5% | 15 AWG

The Intertechnik Ferrobar mushroom-shaped ferrite core inductor offers a refined solution for audio enthusiasts seeking to minimise distortion in loudspeaker crossover networks. Its distinctive geometry and premium construction ensure stable, high-performance operation even under demanding conditions. This 3.90 mH inductor is ideally suited for use in passive crossover designs where precise frequency filtering is critical, such as in high-fidelity home audio systems, studio monitors, and bespoke speaker builds. The component’s robust ferrite core and substantial 1.40 mm copper winding enable it to handle significant power levels without saturation, making it a reliable choice for both midrange and bass applications.

Technically, the inductor features a DC resistance of just 0.28 Ω, which helps preserve signal integrity and minimise energy loss. The outer diameter measures 62 mm, with a central hole of 5 mm and a core diameter of 28 mm, while the total height is 47 mm and the winding width is 35 mm. The recess diameter is 25.5 mm, and the inductance tolerance is a precise ±5.0%. This component is manufactured by Intertechnik, a trusted name in audio engineering, and is categorised under iron core rolls. With its mushroom-shaped ferrite core design, the inductor effectively reduces eddy currents and hysteresis losses, delivering clean, accurate sound reproduction. Whether upgrading an existing crossover or building a new system from scratch, this inductor provides the stability and performance required for serious audio projects.